When it comes to marine engine safety, a quality flame arrestor is non-negotiable. The Mercury Flame Arrestor (863416T) is designed to protect your engine and prevent potential fire hazards by containing flames within the intake system. Specifically built for MerCruiser 4.3L, 5.0L, 5.7L, and 6.2L MPI engines with ECM 555, this OEM part ensures reliable performance without compromising airflow or efficiency.. What Makes This Flame Arrestor Essential?. Critical Fire Prevention - Reduces the risk of backfire-related engine fires by preventing flames from escaping the intake system.. Engineered for MerCruiser MPI Models - Perfect fit and function for 4.3L, 5.0L, 5.7L, and 6.2L engines equipped with ECM 555.. Durable Marine-Grade Construction - Built to withstand harsh marine environments, resisting corrosion and wear over time.. Ideal For:. Routine Maintenance & Safety Checks - Ensuring compliance with marine safety standards and preventing costly engine damage.. Replacing a Worn or Clogge